Restoring Differential Backups

Feb 14, 2002

I am trying to set up a process where a differential backup is taken daily and applied to another DB. For some reason I cannot get the diff backup to restore. The full DB backup restored fine.

Server: Msg 3136, Level 16, State 1, Line 4
Cannot apply the differential backup on device 'diff' to database 'test'.
Server: Msg 3013, Level 16, State 1, Line 4
Backup or restore operation terminating abnormally.

Any suggestions? Thanks!

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Differential Backups

May 2, 2002

I know that the differential backup will only back up information that was changed since the last full database backup, but I have process that I need to implement and need to know if differentials will work.

1. Perform full database backup on Sunday.
2. Perform differential backups Monday thru Friday (twice a day).
3. Perform a database restore on the following Sunday from the backup taken on the previous Sunday.
4. Perform differential backups Monday thru Friday.

At this point I would repeat steps 3 and 4 for the following weeks.

My question is this. Since I didn't actually perform a backup in step 3, but instead performed a database restore, will the differential backup in step 4 backup all of the information changed since step 1??..or will it backup all of the information changed since the restore in step 3? I'm hoping it will only back up the information changed since step 3.

Thanks!

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Differential Backups

Jun 25, 2002

I perform a full database backup at night with a differential backup at noon each day. I created 2 devices to do this. Northwind (for full backups) and northwind_diff (for diff backups).

When the differential is run, it appends each day's noon backup to the northwind_diff file so the file doesn't really reflect only changes - it just keeps growing and growing. I'm using the following syntax to perform the diff backup.

backup database northwind to northwind_diff with differential

Is there a way to initilize the backup device(file) prior to the differential backup being done?

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Differential Backups...

Jul 23, 2001

Hello

I am using SQL 7 database maintenance plans to create full backups for all the databases on my server every night which expire after 7 days, and transaction log backups every hour on some of the databases which also expire after 7 days.

I want to add differential backups but the maintenance plan doesn't allow me to add those. How do I add them, and what naming conventions should I use? I want them to expire after 7 days, but want to backup every 4 hours.

Thanks

Steve.

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Differential Backups

Aug 27, 2001

Hi, I would like to do the following;

Mon - Full Backup
Tue - Differential

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Differential Backups

Aug 28, 2001

Hi, is anyone using differential backups? I would like to have separate differential backups but right now it keeps appending to one big differential backup. If they are separated the older backups can be deleted. How do you do this?

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DIfferential Backups

Sep 12, 2001

I am setting up differential backups thru EM every 4 hours. I append to the existing file. Is there a way to tell it to delete the files older than 2 days thru EM. I looked at the job, there is now way to do this.
Thru Mainplans you can create differential backups, it doesn't show you the option..
Any clues will be appreciated.

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Differential Backups

Sep 27, 2007

Hi Folks!

I did a few searches and found some interesting threads but was not able to understand much. :)

I recently jumped from support to a DBA position and am learning about SQL Server 2000.

My dilemma: We have a SQL 2000 server with about 500GB's worth of databases that has some jobs from the app locking up due to tape backups. I am performing Full nightly and 1/2hour transaction SQL backups. We run daily differential and weekly full tape backups. It is taking 14 hours to run tape backups daily, causing some of the application jobs to fail. So to test it, I stopped the tape job to run one night and none of the App jobs failed.

So, I am hoping that if I start running nightly differentials, weekly fulls, and 1/2 hour trans, it should work. However, I am not very familiar with Differential jobs as till today i have been using maintenance plans. :confused:

My ideal scenario is this: Differentials start on Sat morning and stop before the weekly backup runs on Friday and then delete the older file when starting a new one. Is this possible? how?

C= OS, D=Backup (Raid 0), G=Data (Raid 5), E=Logs(Raid5).

Any help would be appreciated, and obviously if I have missed some piece of information, please feel free to ask.

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Differential Backups In SQL7 Too Big

Jan 11, 2002

Hi all

Can anybody explain why the size of a differential backup in SQL7 is MUCH higher than the one in SQL2000?
Do this test yourself: do a full backup of the pubs database in SQL7 , it will be around 1.5mb, do a differential backup, and it will be 2mb or 4mb.
If you do the same tests in SQL2000 the differential backup is around 200K.
thanks

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Jan 11, 2001

PLEASE HELP...

WE ARE DOWNLOADING THE BACKUP FILE FROM OTHER BRANCH OFFICE AND THE FILE SIZE IS GROWING LIKE HELL SO I AM CHANGING THE BACKUP POLICY TO DOWNLOAD THE DIFFERENTIAL BACKUP FILES EVERYDAY. BUT EVEN THE FILE SIZE GROWS DAY BY DAY UNTILL WE TAKE THE FULL BACKUP THERE. SO I WANT TO TAKE A DIIFERNETIAL BACKUP AND THEN IMMIDIATELY A FULL BACKUP AT THE REMOTE SERVER END. SO MY NEXT DIFFERNTIAL BACKUP WILL HAVE THE DATA OF ONLY PREVIOUS DAY.
FOR THIS I AM SCHEDULING A JOB WHICH FIRST TAKES A DIFFERENTIAL BACKUP AND THEN IMMIDIATELY FULL BACKUP EVERYDAY AT 12.00AM.
BUT I HAVE A CONCERN.. WHILE TAKING THE DIFFERENTIAL BACKUP ANY TRANSACTIONS THAT ARE TO BE COMMITED WILL NOT COMMIT UNTIL THE DIFFERENTIAL BACKUP COMPLETES. BUT IMMIDIATELY I AM STARTING FULL BACKUP. IS THERE ANY CHANCE THAT A TRANSACTION GETTING COMMITTED IN BETWEEN THESE TWO STEPS. IF SO IS THERE ANY WAY .. NOT RELEASE THE DATABASE UNTILL THESE 2 BACKUPS ARE COMPLETED?? I AM RUNNING IT AS A JOB..
ANY SUGGESTION??

THANKS IN ADVANCE.. :-)

KUMAR

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Question About DIFFERENTIAL Backups

Oct 19, 2005

Our production backup schedule is, FULL backup once a month and a DIFFERENTIAL backup every day.

We are starting the FULL and DIFFERENTIAL backups using something similar to

FULL Backup
backup database @DB to disk = @BackupFile

DIFFERENTIAL backup
backup database @DB to disk = @BackupFile WITH DIFFERENTIAL

A full backup was done on 10/6 and the DB size was 48GB. Since then we have been doing DIFFERENTIAL backups. I recently looked at the DIFFERENTIAL backup directory and found something I think is interesting.

10/07/2005 04:00 AM 8,604,160 prodDB_Diff_200510070400.BAK
10/08/2005 04:00 AM 1,144,320 prodDB_Diff_200510080400.BAK
10/09/2005 04:00 AM 1,134,080 prodDB_Diff_200510090400.BAK
10/10/2005 04:00 AM 21,185,024 prodDB_Diff_200510100400.BAK
10/11/2005 04:00 AM 7,119,360 prodDB_Diff_200510110400.BAK
10/12/2005 04:00 AM 163,669,504 prodDB_Diff_200510120400.BAK
10/13/2005 04:00 AM 14,743,040 prodDB_Diff_200510130400.BAK
10/14/2005 04:00 AM 120,875,520 prodDB_Diff_200510140400.BAK
10/15/2005 04:00 AM 1,216,000 prodDB_Diff_200510150400.BAK
10/16/2005 04:00 AM 5,139,968 prodDB_Diff_200510160400.BAK
10/17/2005 04:00 AM 4,277,760 prodDB_Diff_200510170400.BAK
10/18/2005 04:00 AM 2,778,624 prodDB_Diff_200510180400.BAK
10/19/2005 04:01 AM 750,575,104 prodDB_Diff_200510190400.BAK

My understanding of DIFFERENTIAL backups from books online is
"Specifies the database or file backup should consist only of the portions of the database or file changed since the last full backup"

MY Question:
Assuming I am understanding this correctly, all DIFFERENTIAL backups are independent of one another. If a failure happens, all I have to do is restore the latest FULL backup and then
restore the latest DIFFERENTIAL backup.

So, I would think the sizes of the backup files should be in ASCENDING order. Why is the size of the backup file from 10/15/2005 (1,216,000 bytes) smaller than the backup file from 10/14/2005 (120,875,520 bytes).

Assuming a crash happens on 10/15 5AM, I would restore the full backup from 10/6 and then restore the DIFF. backup from 10/15 4AM (Which will apply approx.. 1,216,000 bytes of data). So where has the data in the backup file from 10/14/2005 gone (120,875,520 bytes)?

Thanks

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Full And Differential Backups

Mar 28, 2007

Does the full and differential backups have to be in the same location or can I do a once a week full backup on one drive and everyday differential backups on a different drive?

Thanks

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Feb 12, 2008



Hi,

On our SQL Server 2005 SP 2 i recently updated our Backup Plan.
I now make a Full backup every night, Differential backup every hour and Transaction log backup every 15 minutes.
This all works fine all the time except sometimes when the differential and transaction log backups want to run on the same time and then 1 of the 2 fails.
The error i get is code 0xC0010018. Error loading a task.

I made 1 Maintenance Plan with a subplan for each backup type (Full, differ....), so i can schedule them the way i want.
Searched the internet for an answer but i couldn't find it. The tasks only fail when the run simultaneous. Starting them manually always works.

Anybody has an idea what i need to do to get this working properly?
Thanks!!

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SQL 2012 :: Cleanup Of Differential And Log Backups

Oct 15, 2014

I am using Ola Hallegren's scripts to do backups. He uses @Cleanup Time to delete backups older than a certain number of hours. My situation is I do a full backup of a database on Sunday and then I have a few Differentials and then log backups for the rest of the week. When Sunday rolls around again and my full backup is finished, I would like to delete all the differential backups and log backups. Any way that I could accomplish this using Ola's scripts?

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Unable To Take Differential Or Transaction Log Backups

Dec 7, 2007



Hello SQL Server 2005 SE sp1.
Unable to take differential or transaction log backups. Get the error message a full backup need to be down. Have done a full backup. Immediately upon completion of full have tried diff and transaction log. Still no luck
Other databases on server are fine. Full backup will restore.

Thanks,

Joe

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FULL, Differential And Transactional Backups

May 12, 2008

Hi sql server experts.
This is a beginners question.



Let's say, I run a full backup at 4:30 am it takes usually 35 minutes to finish.

I want to schedule a differential backup to run every hour.

Should I start this job at 5:10 after the full backup finishes? or it doesn't matter?
I am confused about timing.

Let's say my full back up takes 1 hour to finish, that means that when the differential backup runs the full backup will be still running, so in case I need to restore the database, can I use this differential from 5:10 or the differential from 6:10.

Same issue with the transactional, the job runs every 30 minutes, should I started after the differential is done?

I am so confused, what happens with the backups jobs that run while other backups are running?

Is this something that should never happen.

Please advise.

Thanks

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Differential Backups Produce 55GB Files

Jul 16, 2007

We have a SQL 2K5 10GB database that, as part of the recovery plan, gets a differential backup every six hours. Log file backups occur every hour, and a full backup is done every 24 hours. Over the weekend, the differential backup produced a 55GB backup file which caused us a lot of issues besides disk space usage (log backups couldnt finish, mirroring broke, etc.). This is also the max growth size that the log file is set to. There are no errors in the ERRORLOG, or in the job history. It's as if the backup was successful, which I assume it was, but the file was sparse.

I should mention that our full backup is typically 10GB, log file backups are typically 100 to 500MB, and the diff backup is generally 1GB to 3GB.

Has anyone experienced this issue before?
What causes it?
How do we resolve it?

Thank you in advance for your help,
Greg

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Restoring Differential Backup

Feb 9, 2008

Hi,
Im trying to restore the differential backup,I have to restore the full backup first and then restore the differential backup.Can any body tell me the code for this?

my program is like this
--for fullbackup
if type=D
begin
restore database databasename
from disk=path
end
--for differential backup
else if type=I
???

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Tran Log Backups Fail 40 Minutes After The Differential Backup.

Jul 14, 2006

Running SQL Server 2005 Standard Edition.

Database is in Full Recovery mode.

I have full backups scheduled weekly, differentails scheduled daily and tran log ackups scheduled for every 15 minutes.

The tran log backups only work for the first 40 minutes or so after the daily backup. Once the daily has occured, the tran backups will work again, but for only 40 minutes.

I run consistency checks on the db daily and there are no errors.

The error returned from the tran log backup is 'BACKUP LOG cannot be performed because there is no current database backup'

Any thoughts would be appreciated.

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Problem While Restoring Differential Back Up

Nov 16, 2007

Hi Expets!!!!!!!!
I did full back up and restore it. I didn't face any problem while restoring it. After that, I did differential back up. And now trying to restore it. I saw name of all the files at the time of full back up. It were something like ABC.MDF, ABC1.NDF,ABC2.NDF,ABC3.NDF,ABC4.NDF,ABC5.NDF, ABC_log.LDF, ABC_log2.LDF. But now, when I am trying to restore differential back up, I am getting different names, such as, ABC.MDF, ABC2.NDF,ABC3.NDF,ABC4.NDF,ABC5.NDF, ABC6.NDF,ABC_log.LDF, ABC_log2.LDF.It means that, ABC1.NDF file is missing and this time I am getting ABC6.NDF as a extra file. But total number of files are same. How is it possible? I checked, in the original database, there names of the files math exactly with what I am getting in differential back up file. Now I am getting one error message while trying to do differential back up. Any idea what is going on and how to solve this problem? The error message is as follows:-





TITLE: Microsoft SQL Server Management Studio
------------------------------

Restore failed for Server 'SAT01PNGRSQL02'. (Microsoft.SqlServer.Smo)

For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&ProdVer=9.00.3042.00&EvtSrc=Microsoft.SqlServer.Management.Smo.ExceptionTemplates.FailedOperationExceptionText&EvtID=Restore+Server&LinkId=20476

------------------------------
ADDITIONAL INFORMATION:

System.Data.SqlClient.SqlError: This differential backup cannot be restored because the database has not been restored to the correct earlier state. (Microsoft.SqlServer.Smo)

For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&ProdVer=9.00.3042.00&LinkId=20


Today is my dead line for this issue,,,
Can you please give me the answer as quick as possible
and that would be very appriciable.....


-Thanks N Regards,
Kanthi.

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Dec 6, 2007

Hi,

I'm making backups of the database by first making a full backup and then differential backups. The differentials are backed up to separate files.

Restore of the full backup works fine, but I can't restore a differential backup. In Management Studio Express, I first do a full backup restore with option NO RECOVERY and then try to restore a differential backup. But this failes with the message:

"This differential backup cannot be restored because the database has not been restored to the correct earlier state."

Is it possible to restore a differential backup that is backed up to a separate file?

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Jun 15, 2015

We are running a SQL Server 2008R2 64-bit database system on a Windows 2012 R2 64-bit Standard system. I have noticed in recent weeks that our differential backups periodically are taking longer than expected to complete. The usual amount of time is about one hour, but on several occasions, it has taken upwards to five hours. The nights when the job takes longer to complete are on Friday.

I did some checking online, and one possible reason for this issue is my scheduling the reindexing of the database on the morning of the Differential backup. For example, this past Friday the reindexing occurred at 1:00 AM with the Differential running at 10:00 PM that night.The article that I read suggested the reindexing, which takes several minutes, if that, to complete, should be scheduled to run just before the Full backup job.

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Feb 17, 2005

hey guyz..
i got this code.. its running... but i am not able to find the file that has been backed up by the program.. pls help.. if there is anything wrong with the codes pls help me

this code is for creating backups

Dim paramsBackup As String = " -Usa -P -q " & Chr(34) & "Backup database test to disk ='c: est.bak'" & Chr(34) & " -n "

Try
Process.Start("c:program filesmicrosoft sql server80 oolsinnosql.exe", paramsBackup)
MsgBox("Backuped")
Catch ex As Exception
MessageBox.Show(ex.Message)
End Try


this code is for restoring


Dim paramsRestore As String = " -Usa -P -q " & Chr(34) & "restore database test from disk ='c: est.bak'" & Chr(34) & " -n "
Try
Process.Start("c:program filesmicrosoft sql server80 oolsinnosql.exe", paramsRestore)
MsgBox("Restored")
Catch ex As Exception
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Dec 17, 2007

Guys,

In 2000, if I need to restore Transactional backups I have to do it one by one followed by Full Backup or Differntial backups.

I am wondering is there any way I can restore all Transactional files in One Batch in SQL Server 2005?

Many Thanks



SKR

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Nov 1, 2006

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When attempting to restore a database of the same name in SQL Server Express 2k5 I recieve the following error.

System.Data.SqlClient.SqlError: The media set has 2 media families but only 1 are provided

Is there a way to restore the backup without the log backup?

Thank you
-Robert-

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Using Ola Hallengren's scripts I do a full backup of a database on a Sunday. Then differential backups every 6 hours and log backups every hour. I would like to keep a full week of backups based off the full backup done on Sunday. Is there a way for me to clear out the diff and log folders after the successful full backup on Sunday nights?

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this is really doing my head in. any help appreciated.

"A computer once beat me at chess - but it was no match for me at kick boxing" - Emo Phillips.

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